Isolated polyarteritis of testis in hairy-cell leukemia

A polyarteritis nodosalike systemic vasculitis in hairy-cell leukemia was first reported in 1979, and since then at least 30 additional cases of this unusual association have been reported in the literature. Reported herein is, to my knowledge, the first known example of hairy-cell leukemia with necrotizing vasculitis limited to the testis only.